In countries with high susceptibility to corruption, internal government auditors play an important role in combating and mitigating the corruption problem. Since corruption is unethical behavior, government internal auditors must have ethical standards if they are to be effective. Research surrounding the processes of ethical decision making has had mixed outcomes. This article examines the effect of corruption awareness in Indonesian society as a whole, and Indonesian organizations in general. Ethical intensity issues are examined, as are the organizational factors that impact on ethical decision-making. Results are mediated by ethical sensitivity and professional skepticism, with the theoretical framework of ethical decision-making being supported. Additional analysis examining the effect of gender, education level and experience on ethical decision-making process is provided.